Alg 1 3.6 Reciprocals and Division
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Transcript of Alg 1 3.6 Reciprocals and Division
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Algebra 1 3.6
Reciprocals and Division
https://www.youtube.com/watch?v=-Te57fkE6Gc
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Did you know that:
By stating the objectives for the lesson, retention increases by 24%!
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Review:
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Talk with the people on your table about:
2. Consider the fraction . What does the denominator tell you?
Give a real-life example of this fraction.
45
3. What happens when you multiply by its reciprocal, ? Why?
45 4
5
1. What operation is being represented in ? How do you know?45
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Step 1: convert decimal to fraction.
Step 2: Find the reciprocal.
How do you find the reciprocal of 3.14?
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Find the reciprocal of this decimal:
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Find the reciprocal of this decimal:
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1) 45.65
2) 632.6
3) 2.239
4) 0.10394
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Reciprocal Properties:
Property of Reciprocals: a 1a = 1 a1
a = 1
Reciprocal of the Opposite: a
1-a = - 1
Reciprocal of a Product: = 1ab
1a
1b
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Division = Multiplying by a reciprocal
Examples:
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Simplifying Simple Expressions with Reciprocals:
1-7
14
14
4y 13
-6ab -
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Simplifying Complicated Expressions with Reciprocals:
13 (42x - 3y)
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Practice Problems in Algebra 1 Textbook
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